Long-stroke pumping apparatus



, Jan. 3, 1928.

G. KAMMERER ET AL LONG STROKE PUMPING APPARATUS Filed Dec. '7. 1925 2 Sheets-Sheet 1 G; KAMMERER ET AL LONG STROKE PUMPING APPARATUS Jan. 3, 1928.

2 Sheets-Sheet 2 Filed Dec.

lll

STATES PATENT OFFICE.

GEQBGE EAMMEREB, 01' TIER, AND FRANK HILL, 0F LOS ANGELES, GALIFOBNId.

LONG-SERGE PUMPING APPARATUS.

Application filed. lnecemuer '4, 1925. serial Ho. 13,924.

This invention relates to a long stroke pumping apparatus, a type found very usei'ul in the pumping of deep wells such as are found, for example, in some of the oil fields of southern California.

in the pumping of deep oil wells, the eflectiveness of the stroke of the pump plunger is considerably diminished for two reasons. 'Gne reason is that there is a certain amount of gas enters the working barrel with the oil and this gas is compressed by action oi the plunger to a comparatively high pressure before the upper plun er valve will open against the pressure of the liquid above. Another reason is that the sucker rods stretch and buckle, thus actually making the stroke of the plunger much shorter than the stroke of the polish An object of the invention is to provide a comparatively simple pumping apparatus that will increase the production of the well.

To increase the effectiveness of the pump, it has been found desirable to lengthen the stroke or the pump plunger, but one great dificulty encountered in providing a long stroke pumping apparatus suitable for use in the oil fields is due to the fact that the well hole must be readily accessible for pulling the tubing and pump and for accomplishing other operations incident to the maintenance or increase oi production or oil from deep wells, and another object of this invention is to construct and arrange the parts of the apparatus so as to permit or quick displacement from pumping position of those parts of the apparatus t at would interfere with such operations.

Another object of the invention is to eflect the pull on the polish rod in alient with the axis of said rod, thus avoiding side thrust oi the polish rod within the stg box, something that occurs universally with the use or the usual pumping apparatus employing a walking beam or 130k. Such walking beam or jack swings in an arc, thus bending the polish rod first in one direction and then in another. We avoid this side deflection by rimning a flexible member vertically from the grip holding the elish rod over a pulley or the like positions in the derrick with a. point on its periphery at the intersection of a horizonta plane passing through the axis of the pulley with the prolonged axis of the polish rod.

Another object of the invention is to make provision for quick removal of the supportment or": the length of the smoke by a simple construction.

Other objects and advantages will appear hereinafter. Theaccompanying drawings illustrate the invention Figure 1 is a side elevation of a pumping apparatus embodying the invention, only a portion of the derrlck structure, to which the apparatus is attached, be ng shown. The engine employed in operating the apparatus is indicated in dotted lines and the belt connecting said engine with the band wheel alsobeing indicated in broken lines.

Fig. is an enlarged side elevation of the lever, with fragments of the flexible operatmg members connected thereto, and a fragment of the pitman.

3 is an enlarged plan view, mainly in sect on on the line indicated by 3-3, Fi 2.

Fig. d is an enlarged sectional detail on the line indicated by 4-4, Fig. 2.

Fig. 5 is an enlarged side view or" that portion of the pumpin apparatus shown in Fig. 1 within the derii k.

Fig. 6 is an elevation 015 Fig. 5 from the left thereof.

Fig. 7 is a plan view of Fig. 5.

Fig. 8 is a fragmental view illustrating difierent kinds of flexible members, than shown in Fig. 1, for connecting the lever to the grip and to the counter balance.

Fig. 9 is an enlarged plan view of the upper portion of Fig. 2, showing the con nections between the flexible member and the operating means.

Une of the essential elements or the invention is a flexible member 11 which is connected at one end by suitable means to the polish rod 120i the pump, such means, in this instance, being a grip 13 01 the usual or any preferred construction. The construction and operation of such a grip is well understood in the art relating to the pumping of oil wells and, therefore, need not be described in detail herein. The other end of the flexible member 11 is connected to suitable operating means indicated at 14.

To effect the connection, in this instance,

said flexible member is' secured to a clevis which is pivoted at 16 to the operating means 14. In this particular instance, the

operating means 14 constitutes a lever, the fulcrum whereof is a pin 17 carried by bearings 18 which are secured to one of the floor or deck beams 19 of the derrick.

The flexible member 11 has a portion at that end that is connected with the polish I the upper ends of stanchions 22. The lower ends of the stanchions 22 are removably seated in sockets 23 formed by tubular members anchored in cement 24. The stanchions- 22 are preferably clamped in the sockets by set screws 25 mounted in said tubular members and bearing against the stanch1ons.

.. The stanchions 22 may be connected with each other by cross bars 26. Braces 27 are preferably provided for the stanchions 22 and these braces are in the form of simple trusses extending along one side of the stanchions 22. The stanchions 22, cross bars 26 and braces 27 constitute standards. The stanchions are braced from the other side by braces 28 which are removably seated at their upper ends in sockets 29 of the stanchions 22.

The lower ends of the braces 28 are inserted in channels 291 in blocks 30 which are suitably secured to the derrick floor. The braces 28 extend aslant downwardly away from the stanchions 22 and the lower ends of said braces rest against wedges 31 which aredriven between said lower ends and flanges 32 on the blocks 30. The flanges 32 overhang the wedges and are provided with set screws 33 which are tightened against the wedges 31 to hold them in place. The up er ends of the stanchions 22 are anchore to; the derrick and to effect this arms 34 are releasably connected by bolts or cap screws 35, or other suitable fastening devices, to the bearings 36 on the stanchions 22 for the shaft 21. The arms 34 are hinged or pivoted at 37 to brackets 38, respectively, secured to two of the derrick legs 39.

The stuffing box of the pump is indicated at 40 and the pump tubing at 41 but these form no part of the present invention.

In order to counterbalance all or part of the load suspended from the flexible member 11, I provide, in this instance, the following construction: The pivot 16 of the clevis 15 also passes through another clevis 42 to which is attached a flexible member 43 which is movably supported midway of its ends substantially in line with the pulley 20 by a pulley 44 or other suitable idler.

The pulley 44 is rotatably supported at 45 on a suitable support 46 and the flexible member 43 passes over the pulley 44 and is :mately equalling 1n weight the load supported from the flexible member 11. Such supported load includes the pump piston,

sucker rods and liquid column above the pump plunger. The counterbalance 47 slides on a guide rod 60.

Suitable means are provided for oscillating the lever 14 so that, when it moves in one direction, it will exert a pull on the cable 11 to cause the pump plunger to move on' its upstroke and so that, when it moves in the opposite direction, it will exert a pull on the flexible member 43 to raise the counterbalance. and permit of the load on the lunger causing sald plunger to move on its downstroke.

The means that I employ, in this instance, for operatin the lever 14 is a pitman 48 which is ad ustably connected at one end to a crank 49 on a shaft 50 on which is mounted a wheel 51 driven by a belt 52 from an engine 53. The wheel 51 may be, for example, a band wheel. The adjustable connection between the pitman 48 and crank 49 is well understood in this art and need not be described in detail.

The pitman 48 is also adjustably connected at its other end to the lever 14 and to effect this the wrist pin 54 of the pitman 48 is carried by a bearing 55 that is adjustably clamped to a member 56 of circular cross section that constitutes a part of the lever, the bearing 55 being provided with U-bolts 57 which pass through a slot 58 in the lever 14 and embrace the member 56. Thus the wrist pin 54 can be adjusted nearer to the lever fulcrum 17 to lengthen the stroke of the lever or farther from said fulcrum to shorten the stroke.

The flexible members 11, 43 may be in the form of cable as in Figs. 1, 2, 5 and 6 or, if desired, ma be in the form of chains as indicated in hig. 8. The parts that are shown in Fig. 8 that are the functional equivalent of those described above are indicated by the same reference characters with the addition of the letter a. chains are employed it is preferable that sprockets 20, 44 be used, but in order to simplify the claims of this application, it is to be understood that the term flexible member employed in the claims defines either a cable or chain, and that the term idler defines either a pulley, sprocket or sheave.

The apparatus being set up as shown in Fig. 1 and the engine 53 being started into operation, the apparatus operates as follows: The wheel 51 is driven by the engine, thus oscillating the lever 14 which in turn imparts When so that said polish rod will not be deflected Y and caused to bear harder against one side of the stuffing box 40 than the other side.

If it be desired to make repairs to the pump or to deepen the well, the standard supporting the pulley 20 may be quickly removed by the following operations: The grip 13 will first be unclamped from the polish rod 12 and the flexible member 11 will be removed from the pulley 20. The hook of the hoisting tackle, not shown but present in all oil well derricks, will be hooked under the semi-circular cross bar 59 of the standard and the set screws 33 will be loosened. Then the wedges 31 will be knocked out to release the lower ends of the braces 28 and these braces will be taken out of their sockets 29. Then the arms 34. will be disconnected from the bearings 35 and swung laterally to the positions in dicated in broken lines in Fig.7. Also the set screws 25 will be released and the hoisting tackle will then be 0 erated to lift the standard out of the soc ets 24 and away from the well hole so that the hoisting tackle can be employed in the manner'well understood in this art for pulling the pump or pump tubing, as may be desired,vand so that any other desiredoperations may be accomplished. The standard is returned to its pumping position by a reversal of the fore oing described operations.

e claim: w

1. A long stroke pumping apparatus comprising anchored sockets, stanchions removably seated in the sockets, a shaft supported on the stanchions, an idler mounted on said shaft, a flexible member movably supported by the idler, means to connect oneend of the flexible member with the polish rod of a pump, an upright lever connected at its upsockets near their upper ends, a shaft supported on the stanchions, blocks provided with channels, braces engaging the last mentioned sockets and extending aslant downwardly away from the stanchions and into the channels, wedges between the blocks and the lower ends of the braces, a shaft supported on the stanchions, an idler mounted on said shaft, a flexible member movably supported by the idler, means to connect one end of the flexible member with the polish rod of a pump, an upright lever connected at its upper end with the other end of the flexible member, and means to oscillate the lever.

3. A long stroke pumping apparatus comprising anchored sockets, stanchions removably' seated in the sockets, a shaft supported on the stanchions, an idler mounted. on said shaft, a support at a distance from the stan chions, an idler rotatably mounted on said support, an upright lever mounted between the stanchions and support, a flexible member connected at one end to the upper end of the lever and adapted at'its other end for connection to the polish rod of a pump and passing over the first mentioned idler, a second flexiblemember connected at one end to the upper end of the lever and passing over the second mentioned idler, a coupterweight on the other end of the second flexible member, and means to oscillate the lever, I

4. A long stroke pumping apparatus comprising'spaced idlers, ameans for rotatably supporting each ofthe idlers so that they are approximately at the same level above the earth, a lever positioned between the idlers and pivotally supported at its lower end, a flexible member connected to the upper end of the lever and passing over one of the idlers, a means to connect said flexible member to a polish rod, a second flexible member connected at one end to the upper end of the lever and passing over the other idler, a counterbalance secured to the other end of the second flexible member, a pitman connected to the lever between the pivot and the upper end thereof, and a means to per end with the other end'of the flexible operate the pitman.

- member. and means to oscillate the lever.

2. A long stroke pumping apparatus comprising anchored sockets, stanchions remov ably seated in the sockets and provided with Signed at Los Angeles, California, this 1st day of December, 1925.

GEORGE KAMMERER. FRANK HILL. 

